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Context: Giant-cell convection is believed to be an important component ofsolar dynamics. For example, it is expected to play a crucial role inmaintaining the Sun's differential rotation.  Aims: We re-examine early reports of giant convective cells detected usingcorrelation analysis of Dopplergrams. We extend this analysis using 19 years ofspace and ground-based observations of near-surface horizontal flows.  Method: Flow maps are derived through local correlation tracking of granulesand helioseismic ring-diagram analysis. We compute temporal auto-correlationfunctions of the east-west flows at fixed latitude.  Results: Correlations in the east-west velocity can be clearly seen up tofive rotation periods. The signal consists of features with longitudinalwavenumbers up to m=9 at low latitudes. Comparison with magnetic imagesindicates that these flow features are associated with magnetic activity. Thesignal is not seen above the noise level during solar minimum.  Conclusions: Our results show that the long-term correlations in east-westflows at low latitudes are dominantly due to inflows into active regions andnot to giant convective cells.

Solar east-west flow correlations that persist for months at low latitudes are dominated by active region inflows